I believe that there might be similarities between the NEPOMUK project and SOLID and some outputs can be reused.
“NEPOMUK (Networked Environment for Personal, Ontology-based Management of Unified Knowledge) is an open-source software specification that is concerned with the development of a social semantic desktop that enriches and interconnects data from different desktop applications using semantic metadata stored as RDF. Between 2006 and 2008 it was funded by a European Union research project of the same name that grouped together industrial and academic actors to develop various Semantic Desktop technologies.”
Perhaps some of the many vocabularies produced in NEPOMUK can be revisited and adapted to be used in SOLID.
The Shared Desktop vocabularies: http://oscaf.sourceforge.net/